Update 'backlog.md'

backlog.md

@@ -11,7 +11,6 @@
 - [CSRF](https://en.wikipedia.org/wiki/Cross-site_request_forgery)
 - [Academic ranks in Canada](https://en.wikipedia.org/wiki/Academic_ranks_in_Canada) *(added 5/22/2023)*
 - [Random Number generation](https://en.wikipedia.org/wiki/Random_number_generation) *(added 5/22/2023)*
-- [Levin Algorithm](https://en.wikipedia.org/wiki/P_versus_NP_problem#Polynomial-time_algorithms)
 - [Quora Answer for dental health](https://www.quora.com/Is-it-possible-for-an-elderly-person-to-keep-his-her-teeth-healthy-till-his-her-death)
 - [Teletype](https://en.wikipedia.org/wiki/Teleprinter)
 - [The Crackpot Index](https://math.ucr.edu/home/baez/crackpot.html)
@@ -57,10 +56,10 @@
 - [Simon's Algorithm](https://en.wikipedia.org/wiki/Simon%27s_problem)
 - [Galois Connection](https://en.wikipedia.org/wiki/Galois_connection)
 - [Groebner Basis](https://en.wikipedia.org/wiki/Gr%C3%B6bner_basis)
-- [Nim](https://en.wikipedia.org/wiki/Nim)
-- [AS WE MAY THINK by VANNEVAR BUSH](http://web.mit.edu/STS.035/www/PDFs/think.pdf)
 - [Dice Problem](https://blog.computationalcomplexity.org/2024/01/a-nice-dice-problem-part-2.html)
 - [Polynomials and RE](https://blog.computationalcomplexity.org/2024/01/certifying-number-is-in-set-using.html)
+- [Holevo's Theorem](https://en.wikipedia.org/wiki/Holevo%27s_theorem)
+
 
 ## Reference Book Backlog
 - Bartlett's Familiar Quotations